OvmfPkg: Remove macro MAX_LOONGARCH_EXCEPTION #694

Job	Run time
Analyze (ArmPkg, IA32,X64)	4m 11s
Analyze (CryptoPkg, IA32)	17m 14s
Analyze (CryptoPkg, X64)	18m 22s
Analyze (DynamicTablesPkg, IA32,X64)	11m 58s
Analyze (FatPkg, IA32,X64)	9m 9s
Analyze (FmpDevicePkg, IA32,X64)	9m 17s
Analyze (IntelFsp2Pkg, IA32,X64)	11m 1s
Analyze (IntelFsp2WrapperPkg, IA32,X64)	9m 16s
Analyze (MdeModulePkg, IA32)	14m 40s
Analyze (MdeModulePkg, X64)	15m 0s
Analyze (MdePkg, IA32,X64)	10m 48s
Analyze (PcAtChipsetPkg, IA32,X64)	6m 36s
Analyze (PrmPkg, IA32,X64)	10m 5s
Analyze (SecurityPkg, IA32,X64)	12m 13s
Analyze (ShellPkg, IA32,X64)	13m 43s
Analyze (SourceLevelDebugPkg, IA32,X64)	9m 4s
Analyze (StandaloneMmPkg, IA32,X64)	8m 49s
Analyze (UefiCpuPkg, IA32,X64)	11m 9s
Analyze (UnitTestFrameworkPkg, IA32,X64)	6m 50s
	3h 29m 25s

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